|Rank|Nation|Gold|Silver|Bronze|Total|
|---|---|---|---|---|---|
|1.|United States|8|7|1|16|
|2.|Russia|7|7|5|19|
|3.|France|3|3|2|8|
|4.|Ethiopia|3|2|2|7|
|5.|Belarus|3|1|3|7|
|6.|Sweden|2|1|2|5|
|7.|Kenya|2|1|1|4|
|7=|South Africa|2|1|1|4|
|9.|Morocco|2|1|0|3|
|10.|Greece|1|1|2|4|
|11.|Cuba|1|1|0|2|
|12.|Italy|1|0|2|3|
|13.|Canada|1|0|1|2|
|14.|Algeria|1|0|0|1|
|14=|Australia|1|0|0|1|
|14=|Dominican Republic|1|0|0|1|
|14=|Ecuador|1|0|0|1|
|14=|Lithuania|1|0|0|1|
|14=|Mexico|1|0|0|1|
|14=|Mozambique|1|0|0|1|
|14=|Poland|1|0|0|1|
|14=|Qatar|1|0|0|1|
|14=|Saint Kitts and Nevis|1|0|0|1|
|24.|Jamaica|0|4|2|6|
|25.|Spain|0|3|2|5|
|26.|Hungary|0|2|0|2|
|27.|Germany|0|1|3|4|
|27=|Japan|0|1|3|4|
|27=|Ukraine|0|1|3|4|
|30.|Great Britain|0|1|2|3|
|31.|Brazil|0|1|0|1|
|31=|Cameroon|0|1|0|1|
|31=|Czech Republic|0|1|0|1|
|31=|Estonia|0|1|0|1|
|31=|Ireland|0|1|0|1|
|31=|Trinidad and Tobago|0|1|0|1|
|31=|Turkey|0|1|0|1|
|38.|Bahamas|0|0|3|3|
|39.|China|0|0|2|2|
|40.|India|0|0|1|1|
|40=|Kazakhstan|0|0|1|1|
|40=|Netherlands|0|0|1|1|
|40=|Senegal|0|0|1|1|

Question: what was the difference in rank between the u.s. and canada?
Answer: 12